CN106644457A - Transmission system vibration testing device - Google Patents
Transmission system vibration testing device Download PDFInfo
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- CN106644457A CN106644457A CN201610726405.2A CN201610726405A CN106644457A CN 106644457 A CN106644457 A CN 106644457A CN 201610726405 A CN201610726405 A CN 201610726405A CN 106644457 A CN106644457 A CN 106644457A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
Abstract
The invention provides a transmission system vibration testing device and belongs to the vibration detection technology field. The device comprises a cabinet body and a road wheel installed on a bottom surface of the cabinet body. The cabinet body comprises at least one accommodation chamber. A sensor probe and a sampling circuit are arranged in the accommodation chamber, wherein the sensor probe is used for detecting vibration; and the sampling circuit is used for receiving a vibration signal detected by the sensor probe and carrying out signal processing. In the device, system hardware needed by vibration testing is integrated into one cabinet body which can move through the road wheel so that the testing device can be conveniently moved to a place where the vibration testing is needed to be performed. The device is especially suitable for transmission system production line field product vibration testing, such as a motor manufacturer, a gear case manufacturer, various pump manufacturers, a compressor manufacturer, a centrifuge manufacturer, a wind driven generator manufacturer and the like.
Description
Technical field
The present invention relates to vibration detection technology field, and in particular to a kind of driveline vibrations test device.
Background technology
Vibration is to affect equipment safety, the key factor of stable operation.Vibration is again equipment " clinical thermometer ", can be reflected
The health condition of equipment, is the important indicator of equipment safety assessment.When one unit normally runs, its vibration values and vibration become
Change value all should be smaller.Once unit vibration value becomes big, or vibrates the unstable of change, all illustrate that equipment is occurred in that to a certain degree
Failure.
As the foundation of its fault diagnosis it is a kind of the most frequently used effective ways by the vibration signal of collection machinery equipment,
Particularly to heavy mechanical equipment.The vibration characteristics of machinery is unique to some failure and specials, by dividing vibration signal
Analysis and process, can determine failure Producing reason.In plant equipment maintenance test and dispatch from the factory in quality inspection, using divided oscillation signal
It is a kind of most efficient method for excluding mechanical breakdown that analysis method is monitored to mechanical specific part.
Existing vibration detection device, generally requires and removes to vibration detection device to be shaken by part to be measured or unit to be measured
Dynamic detection, detects that work is difficult to if running into for part to be measured or unit to be measured for being difficult to carry etc..And it is right in needs
When product on production line carries out vibration-testing, producer needs to arrange multiple vibration detection devices in different production line positions,
Production space is not only taken up, causes the raising of production cost yet.
The content of the invention
Therefore, the technical problem to be solved in the present invention is existing vibration detection device movement inconvenience, causes much to shake
Dynamic detection test is carried out with being unable to economical and efficient.
For this purpose, embodiments providing following technical scheme：
A kind of driveline vibrations test device, including：Cabinet and be installed on the road wheel of cabinet floor, cabinet include to
A few containing cavity, accommodating intracavity is provided with for the sensor probe of detection vibration and for receiving what sensor probe was detected
Vibration signal simultaneously carries out the sample circuit of signal processing.
Alternatively, sensor probe is provided with magnetic absorption member, to be tested for being fixed on sensor probe using magnetic attraction
On part.
Alternatively, road wheel is provided with self-locking device.
Alternatively, containing cavity at least two, one of containing cavity is used to place each device of sample circuit, wherein separately
One containing cavity can be used to place sensor probe, sensor probe cable and power cable.
Alternatively, each face of containing cavity for placing each device of sample circuit is provided with shielding part, for reducing external interference pair
The impact of sample circuit；Or the cavity wall of the containing cavity of each device of placement sample circuit adopts electromagnetic shielding material.
Alternatively, cabinet also includes operating table surface, and operating table surface is provided with display screen and operation keyboard.
Alternatively, also including movable motor, drive shaft, drive gear and power transmission shaft, the circumference of power transmission shaft is formed and drive
The tooth of moving gear engagement, the two ends of power transmission shaft are connected respectively with two road wheels as drivewheel, and movable motor is by driving
Axle drives drive gear to rotate, and drive gear is rotated and drives power transmission shaft along its axial rotation to drive two rows as drivewheel
Walk wheel to rotate.
Alternatively, sample circuit has a 4-32 roads sampling channel, signal conditioning circuit that sample circuit includes being sequentially connected,
A/D convertor circuit and processor, signal conditioning circuit is used to receiving the vibration signal that sensor probe detects and carries out at signal
Reason, the signal processing includes filtering and Voltage Cortrol, and the vibration signal that A/D convertor circuit is used to export signal conditioning circuit turns
Digital signal is changed to, processor is used to receive the digitized vibration signal of A/D convertor circuit output and be analyzed and processed.
Alternatively, also including host computer, host computer is used for the vibration signal of receiving processor output and carries out secondary analysis
Process, show analysis result and receive operational order and be transferred to processor, host computer is notebook computer, panel computer or intelligence
Can mobile phone.
Alternatively, signal conditioning circuit includes pre-filter circuit and modulate circuit；
Pre-filter circuit includes low-pass first order filter and the second-order low pass filter being sequentially connected in series, wherein,
Low-pass first order filter includes amplifier U1, resistance R1, resistance R2, electric capacity C1 and electric capacity C2, the of resistance R1
Used as the input of pre-filter circuit, the second end one end respectively with electric capacity C1, one end of resistance R2 be connected for one end, electric capacity C1
Other end inverting input respectively with amplifier U1, outfan be connected, the other end of resistance R2 is respectively with amplifier U1's
One end connection of in-phase input end, electric capacity C2, the other end ground connection of electric capacity C2；
Second-order low pass filter includes resistance R3-R5, electric capacity C3-C5 and amplifier U2, the first end conduct of resistance R3
The input of second-order low pass filter is connected with the outfan of the amplifier U1 of low-pass first order filter, and the second of resistance R3
End one end respectively with electric capacity C3, one end of resistance R4 are connected, the other end of resistance R4 respectively with the homophase input of amplifier U2
End, one end connection of electric capacity C4, the other end ground connection of electric capacity C4, the other end of electric capacity C3 respectively with the anti-phase input of amplifier U2
End, one end of electric capacity C5, the second end connection of resistance R5, the other end of electric capacity C5 is connected with the outfan of amplifier U2, resistance
The first end of R5 is connected with the outfan of amplifier U2, the second end as pre-filter circuit outfan；
Modulate circuit includes amplifying circuit and the voltage offset electric circuit being sequentially connected, wherein,
Amplifying circuit includes resistance R6, resistance R8, adjustable resistance R7 and amplifier U3, one end of resistance R6 and pre-filtering
The outfan connection of circuit, other end inverting input respectively with amplifier U3, one end of adjustable resistance R7 are connected, adjustable electric
The other end of resistance R7 is connected with the outfan of amplifier U3, and one end of resistance R8 is connected with the in-phase input end of amplifier U3, separately
One end is grounded；
Voltage offset electric circuit includes resistance R9-R12, electric capacity C7 and amplifier U4, and one end of resistance R9 is with amplifier U3's
Outfan connects, and other end one end respectively with resistance R10, one end of resistance R11, one end of resistance R12 are connected, resistance R10
Another termination bias voltage, the other end of resistance R11 is connected with the inverting input of amplifier U4, the other end of resistance R12
It is connected with the outfan of amplifier U4, one end of electric capacity C7 is connected with the inverting input of amplifier U4, the other end and amplifier
The outfan connection of U4, the in-phase input end ground connection of amplifier U4.
Technical solution of the present invention, has the advantage that：
Driveline vibrations test device provided in an embodiment of the present invention, the system hardware needed for vibration-testing is integrated into
One can be by the cabinet of road wheel movement, such that it is able to easily the test device be moved to into needs vibration survey being carried out
Where examination.The device is particularly suited for drive system production line scene product vibration-testing, such as motor manufacturing producer, gear
Case manufacturing firm, various pump manufacturer men, Compressor Manufacturing producer, centrifuge manufacturing firm and wind-driven generator manufacture producer
Deng.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is driveline vibrations test device structural representation in the embodiment of the present invention 1；
Fig. 2 is the structural representation of sensor probe in the embodiment of the present invention 1；
Fig. 3 is the structural representation of running gear in the embodiment of the present invention 1；
Fig. 4 is the structured flowchart of sample circuit in the embodiment of the present invention 1；
Fig. 5 is the circuit diagram of signal conditioning circuit in the embodiment of the present invention 1；
Fig. 6 is the structural representation of driveline vibrations test device in the embodiment of the present invention 2；
Fig. 7 is another structural representation of driveline vibrations test device in the embodiment of the present invention 2；
Fig. 8 is the main structure diagram of driveline vibrations test device in the embodiment of the present invention 2；
Fig. 9 is the overlooking the structure diagram of driveline vibrations test device in the embodiment of the present invention 2；
Figure 10 is that the survey of driveline vibrations test device in the embodiment of the present invention 2 regards structural representation；
Reference：1- cabinets, 11- operating table surfaces, the containing cavities of 12- first, the containing cavities of 13- second, 15- the 3rd is housed
Chamber, the containing cavities 16 of 16- the 4th, 101- magnetic absorption members, 102- sensor bodies, 2- road wheels, 21- movable motors, 22- drive shafts,
23- drive gears, 24- power transmission shafts, 3- handrails, 4- display screens, 5- operation keyboards, 121- signal conditioning circuits, the preposition filters of 1211-
Wave circuit, 1212- modulate circuits, 122-AD change-over circuits, 123- processors, 124- host computers.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
As long as additionally, technical characteristic involved in invention described below different embodiments non-structure each other
Just can be combined with each other into conflict.
Embodiment 1
As shown in figure 1, originally applying example provides a kind of driveline vibrations test device, including：Cabinet 1 and it is installed on cabinet 1
The road wheel 2 of bottom surface, cabinet 1 include at least one containing cavity, accommodating intracavity be provided with for detection vibration sensor probe and
For the sample circuit for receiving the sensor probe vibration signal for detecting and carry out signal processing.
The driveline vibrations test device, the system hardware needed for vibration-testing is integrated into into one can be by walking
On the cabinet 1 of the movement of wheel 2, need to carry out where vibration-testing such that it is able to easily move to the test device.The dress
Put and be particularly suited for drive system production line scene product vibration-testing, for example motor manufacturing producer, gear-box manufacturing firm, each
Plant pump manufacturer man, Compressor Manufacturing producer, centrifuge manufacturing firm and wind-driven generator manufacture producer etc..
In addition, the device is also provided with handrail 3 in the side of cabinet 1, so that more easily controlling the movement of the device.
Operating table surface 11 on cabinet 1 can be easy to manual record detection data, it can also be used to place the notebook electricity as host computer 124
Brain or panel computer.
Used as preferred embodiment, the sensor probe is provided with magnetic absorption member 101, for being sensed using magnetic attraction
Device probe is fixed on test specimen to be measured.Specifically as shown in Fig. 2 sensor probe includes sensor body 102 and magnetic absorption member 101.
The advantage for fixing sensor probe using magnetic absorption member 101 is convenient connection and dismantles, and test specimen need not be arranged specially
Attachment structure.So as to the vibration-testing apparatus are widely portable to various vibration-testing occasions.
Preferred embodiment road wheel 2 is provided with self-locking device as another, fix during on-the-spot test with being facilitated.
Used as specific embodiment, containing cavity at least two, one of containing cavity is used to place sample circuit
Each device, other in which containing cavity can be used to place sensor probe, sensor probe cable and power cable.In others
In specific embodiment, the containing cavity can be multiple, as shown in figure 1, wherein the first containing cavity 12 is used to place sample circuit
Each device, the second containing cavity 13 can be divided into multiple independent accommodation spaces using dividing plate, with the spy of sorting placement sensor
Head and cable etc..Furthermore it is also possible to the 3rd containing cavity 15 and the 4th containing cavity 16 are set, to place portable host computer 124,
Such as notebook computer and panel computer etc., or place other desired instrument.
The driveline vibrations test device that the present embodiment is provided, also including host computer 124, host computer 124 is used to receive
Sample circuit processor 123 output vibration signal and carry out secondary analysis process, show analysis result and receive operation refer to
Make and be transferred to the processor 123 of sample circuit, host computer 124 can be notebook computer, panel computer or smart mobile phone, or
Person other intelligent terminal.
In the present embodiment, containing cavity (i.e. the first containing cavity 12) each face for placing each device of sample circuit is provided with shielding
Part, for reducing impact of the external interference to sample circuit；Or place sample circuit each device containing cavity (i.e. first house
Chamber 12) cavity wall adopt electromagnetic shielding material.
In order to more easily move the test device, as shown in figure 3, the device is also preferably equipped with movable motor 21, drives
Moving axis 22, drive gear 23 and power transmission shaft 24, the circumference of power transmission shaft 24 forms the tooth engaged with drive gear 23, power transmission shaft 24
Two ends be connected with two road wheels 2 as drivewheel respectively, movable motor 21 by drive shaft 22 drive drive gear 23
Rotate, drive gear 23 is rotated and drives power transmission shaft 24 along its axial rotation to drive two road wheels 2 as drivewheel to rotate.
Specifically, the sample circuit in the present embodiment has 4-32 roads sampling channel, and correspondingly, the device has 4-
32 sensor probes, can meet various vibration-testing occasions.For example, for the vibration-testing of motor, the device can be same
When detect motor free end shaft bearing vibration signal both horizontally and vertically, and Motor drive end bearing block level, hang down
Straight and axially three directions vibration signal, that is, need logical using 5 sensor probes therein and corresponding 5 samplings
Road.Other detection objects, such as gear-box, pump, compressor and centrifuge etc., it is also possible to detect multiple simultaneously using the device
The vibration signal of the different directions of diverse location.Most importantly the device can carry out vibration-testing to complete unit, for example
Wind power generating set producer can be simultaneously to dispatch from the factory complete unit and dragging unit while test.The arrangement of sensor probe
Mode can be：Radial and axial 2 measuring points of gear-box output high speed end bearing block of generating set, gear-box output low speed end
Radial and axial 2 measuring points of bearing block, gear housing bull gear position 1 measuring point of radial direction, gear box input bearing block radial direction 1
Individual measuring point and radial and axial 2 measuring points of spindle bearing holder, the generator drive end bearing block level of generating set, vertical and axle
To 3 measuring points, horizontal and vertical 2 measuring points of electromotor free end shaft bearing, the gear-box output high speed end bearing of unit is dragged
Radial and axial 2 measuring points of seat, radial and axial 2 measuring points of gear-box output low speed end bearing block, gear housing bull gear portion
Position 1 measuring point of radial direction, gear box input bearing block radial direction 1 measuring point, radial and axial 2 measuring points of spindle bearing holder, drag
The generator drive end bearing block level of unit, vertical and axial direction 3 measuring points, electromotor free end shaft bearings horizontal and vertical 2
Individual measuring point, drags the generator drive end bearing block level of the motor of unit, vertical and the measuring point of axial direction 3, electromotors certainly
By horizontal and vertical 2 measuring points of end bearing block, namely configurable 18 surveys of configurable 13 measuring points of the unit that dispatches from the factory, dragging unit
Point.
As shown in figure 4, above-mentioned sample circuit specifically includes the signal conditioning circuit 121, A/D convertor circuit being sequentially connected
122 and processor 123, signal conditioning circuit 121 is used to receiving the vibration signal that sensor probe detects and carries out at signal
Reason, the signal processing includes filtering and Voltage Cortrol, and A/D convertor circuit 122 is used for the vibration for exporting signal conditioning circuit 121
Signal is converted to digital signal, and processor 123 is used to receive the digitized vibration signal of the output of A/D convertor circuit 122 and carry out
Analyzing and processing.The processor 123 can carry out preliminary analyses to obtain the information such as vibration amplitude and frequency to vibration signal, then
Carried out secondary analysis by host computer 124 to judge to vibrate whether abnormal and abnormal possible cause occurs.The sample circuit
Memorizer can also be set, the vibration signal for detecting or the vibration information Jing after the preliminary treatment of processor 123 are stored
Come, to facilitate follow-up access.
Specifically, as shown in figure 5, signal conditioning circuit 121 includes pre-filter circuit 1211 and modulate circuit 1212；
Pre-filter circuit 1211 includes low-pass first order filter and the second-order low pass filter being sequentially connected in series, its
In,
Low-pass first order filter includes amplifier U1, resistance R1, resistance R2, electric capacity C1 and electric capacity C2, the of resistance R1
Used as the input of pre-filter circuit 1211, the second end one end respectively with electric capacity C1, one end of resistance R2 be connected for one end, electricity
Hold the other end inverting input respectively with amplifier U1 of C1, outfan to be connected, the other end of resistance R2 respectively with amplifier
The in-phase input end of U1, one end connection of electric capacity C2, the other end ground connection of electric capacity C2；
Second-order low pass filter includes resistance R3-R5, electric capacity C3-C5 and amplifier U2, the first end conduct of resistance R3
The input of second-order low pass filter is connected with the outfan of the amplifier U1 of low-pass first order filter, and the second of resistance R3
End one end respectively with electric capacity C3, one end of resistance R4 are connected, the other end of resistance R4 respectively with the homophase input of amplifier U2
End, one end connection of electric capacity C4, the other end ground connection of electric capacity C4, the other end of electric capacity C3 respectively with the anti-phase input of amplifier U2
End, one end of electric capacity C5, the second end connection of resistance R5, the other end of electric capacity C5 is connected with the outfan of amplifier U2, resistance
The first end of R5 is connected with the outfan of amplifier U2, the second end as pre-filter circuit 1211 outfan, wherein electric capacity
C5 and resistance R5 constitutes the phase compensation link of filter circuit, can effectively prevent the generation of amplifying circuit self-excitation phenomena；
Modulate circuit 1212 includes amplifying circuit and the voltage offset electric circuit being sequentially connected, wherein,
Amplifying circuit includes resistance R6, resistance R8, adjustable resistance R7 and amplifier U3, one end of resistance R6 and pre-filtering
The outfan connection of circuit 1211, other end inverting input respectively with amplifier U3, one end of adjustable resistance R7 are connected, can
The other end for adjusting resistance R7 is connected with the outfan of amplifier U3, and one end of resistance R8 connects with the in-phase input end of amplifier U3
Connect, the other end is grounded, wherein the amplification of the amplifying circuit can be adjusted by adjusting the resistance of adjustable resistance R7；
Voltage offset electric circuit includes resistance R9-R12, electric capacity C7 and amplifier U4, and one end of resistance R9 is with amplifier U3's
Outfan connects, and other end one end respectively with resistance R10, one end of resistance R11, one end of resistance R12 are connected, resistance R10
Another termination bias voltage, the other end of resistance R11 is connected with the inverting input of amplifier U4, the other end of resistance R12
It is connected with the outfan of amplifier U4, one end of electric capacity C7 is connected with the inverting input of amplifier U4, the other end and amplifier
The outfan connection of U4, the in-phase input end ground connection of amplifier U4.
Embodiment 2
As illustrated in figures 6-10, originally apply example and provide another kind of driveline vibrations test device, the area with above-described embodiment 1
It is not：The operating table surface 11 of cabinet 1 is provided with display screen 4 and operation keyboard 5, and the display screen 4 and operation keyboard 5 are electric with sampling
The processor 123 or host computer 124 on road connects, and the host computer 124 can adopt common desk computer.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (10)
1. a kind of driveline vibrations test device, it is characterised in that include：Cabinet (1) and it is installed on the cabinet (1) bottom surface
Road wheel (2), the cabinet (1) including at least one containing cavity, the accommodating intracavity be provided with for detection vibration sensing
Device is popped one's head in and the sample circuit for receiving the sensor probe vibration signal for detecting and carry out signal processing.
2. driveline vibrations test device according to claim 1, it is characterised in that the sensor probe is provided with
Magnetic absorption member (101), for the sensor probe to be fixed on into test specimen to be measured using magnetic attraction.
3. driveline vibrations test device according to claim 1, it is characterised in that the road wheel (2) is provided with
Self-locking device.
4. driveline vibrations test device according to claim 1, it is characterised in that the containing cavity is at least two
Individual, one of containing cavity is used to place each device of the sample circuit, and other in which containing cavity can be used to place described
Sensor probe, sensor probe cable and power cable.
5. driveline vibrations test device according to claim 4, it is characterised in that place each of the sample circuit
The each face of containing cavity of device is provided with shielding part, for reducing impact of the external interference to the sample circuit；Or adopt described in placing
The cavity wall of the containing cavity of each device of sample circuit adopts electromagnetic shielding material.
6. driveline vibrations test device according to claim 1, it is characterised in that the cabinet (1) also includes behaviour
Make table top (11), the operating table surface (11) is provided with display screen (4) and operation keyboard (5).
7. driveline vibrations test device according to claim 1, it is characterised in that also including movable motor (21),
Drive shaft (22), drive gear (23) and power transmission shaft (24), the circumference of the power transmission shaft (24) is formed and the drive gear
(23) tooth of engagement, the two ends of the power transmission shaft (24) are connected respectively with two road wheels (2) as drivewheel, the walking
Motor (21) drives the drive gear (23) to rotate by drive shaft (22), and the drive gear (23) rotates and drives the biography
Moving axis (24) is along its axial rotation to drive two road wheels (2) as drivewheel to rotate.
8. driveline vibrations test device according to claim 1, it is characterised in that the sample circuit has 4-32
Road sampling channel, the sample circuit includes the signal conditioning circuit (121) being sequentially connected, A/D convertor circuit (122) and processes
Device (123), the signal conditioning circuit (121) is for receiving vibration signal that the sensor probe is detected and carry out signal
Process, the signal processing includes filtering and Voltage Cortrol, and the A/D convertor circuit (122) is for by the signal conditioning circuit
(121) vibration signal of output is converted to digital signal, and the processor (123) is for receiving the A/D convertor circuit (122)
The digitized vibration signal of output is simultaneously analyzed and processed.
9. driveline vibrations test device according to claim 8, it is characterised in that also including host computer (124), institute
Host computer (124) is stated for receiving the vibration signal of the processor (123) output and carrying out secondary analysis process, show analysis
As a result operational order and the processor (123) is transferred to receiving, the host computer (124) is notebook computer, flat board electricity
Brain or smart mobile phone.
10. driveline vibrations test device according to claim 8 or claim 9, it is characterised in that the signal conditioning circuit
(121) including pre-filter circuit (1211) and modulate circuit (1212)；
The pre-filter circuit (1211) including the low-pass first order filter and second-order low pass filter being sequentially connected in series, its
In,
The low-pass first order filter includes amplifier U1, resistance R1, resistance R2, electric capacity C1 and electric capacity C2, the resistance R1
First end as the pre-filter circuit (1211) input, it is the second end one end respectively with the electric capacity C1, described
One end connection of resistance R2, the other end of electric capacity C1 inverting input respectively with the amplifier U1, outfan are connected,
The other end of resistance R2 in-phase input end respectively with the amplifier U1, one end of the electric capacity C2 are connected, the electricity
Hold the other end ground connection of C2；
The second-order low pass filter includes resistance R3-R5, electric capacity C3-C5 and amplifier U2, the first end of the resistance R3
It is connected with the outfan of the amplifier U1 of the low-pass first order filter as the input of the second-order low pass filter,
Second end of resistance R3 one end respectively with the electric capacity C3, one end of the resistance R4 are connected, and the resistance R4's is another
One end in-phase input end respectively with the amplifier U2, one end of the electric capacity C4 are connected, another termination of the electric capacity C4
Ground, the other end of electric capacity C3 inverting input, one end of the electric capacity C5, the resistance respectively with the amplifier U2
The second end connection of R5, the other end of the electric capacity C5 is connected with the outfan of the amplifier U2, and the first of the resistance R5
End be connected with the outfan of the amplifier U2, the second end as the pre-filter circuit (1211) outfan；
The modulate circuit (1212) including the amplifying circuit and voltage offset electric circuit being sequentially connected, wherein,
The amplifying circuit include resistance R6, resistance R8, adjustable resistance R7 and amplifier U3, one end of the resistance R6 with it is described
Pre-filter circuit (1211) outfan connection, the other end respectively with inverting input, the adjustable resistance of the amplifier U3
One end connection of R7, the other end of the adjustable resistance R7 is connected with the outfan of the amplifier U3, and the one of the resistance R8
End is connected with the in-phase input end of the amplifier U3, other end ground connection；
The voltage offset electric circuit includes resistance R9-R12, electric capacity C7 and amplifier U4, and one end of the resistance R9 is put with described
The outfan connection of big device U3, other end one end respectively with resistance R10, one end of resistance R11, one end of resistance R12 are connected,
Another termination bias voltage of the resistance R10, the other end of the resistance R11 connects with the inverting input of the amplifier U4
Connect, the other end of the resistance R12 is connected with the outfan of the amplifier U4, one end and the amplifier of the electric capacity C7
The inverting input connection of U4, the other end are connected with the outfan of the amplifier U4, the in-phase input end of the amplifier U4
Ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610726405.2A CN106644457A (en) | 2016-08-25 | 2016-08-25 | Transmission system vibration testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610726405.2A CN106644457A (en) | 2016-08-25 | 2016-08-25 | Transmission system vibration testing device |
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| CN106644457A true CN106644457A (en) | 2017-05-10 |
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| CN201610726405.2A Pending CN106644457A (en) | 2016-08-25 | 2016-08-25 | Transmission system vibration testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112213099A (en) * | 2020-09-29 | 2021-01-12 | 如皋市蓝鹰齿轮制造有限公司 | Partial rotation type valve gear box fault detection device and method |
| CN113507077A (en) * | 2021-07-12 | 2021-10-15 | 国网安徽省电力有限公司宿州供电公司 | Device for transmission interaction test of secondary virtual loop of substation reconstruction and extension |
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